Improvement in bed-bottoms



I. E. PRAUL.

BED-BUTTONS.

No. 185,779. Patented Dec. 26, 1876.

THC GRAPH: Eli-FLY- UrrED STATES PATENT OFFICE.

JOHN E. PRAUL, OF NEW YORK, N. Y.

IMPROVEMENT IN BED-BOTTOMS.

Specification forming part of Letters Patent No. 185,779, dated December26, 1876; application filed October 23, 1876.

To all whom *itmay concern:

Be it known that I, JOHN E. PRAUL, of the city, county, and State of NewYork, have invented a new and Improved Bed Bottom; and that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawing, and to the letters of referencemarked thereon, making part of this specification.

This invention is in the nature of an improvementin bed-bottoms; and theinvention consists in a bed bottom constructed with transverse braces orbed-pieces, combined with double C-springs, which support the slats ofthe bed-bottom in two places, in the manner hereinafter described.

In the accompanying sheet of drawings, Figure 1 is a plan or top view ofmy improved bed-bottom, and Fig. 2 is a longitudinal section thereof.

Similar letters of reference indicate like parts in the several figures.

Arepresents a bed-bottom, with side pieces a (1. These side pieces areunited by braces or bed-pieces B B, extending across from one side pieceto the other. These side pieces are beveled, so that their section is oftriangular shape, the base of the triangle being downward. To the top ofthese bed pieces B are secured a series of flat metal springs, O, in theform that is known as double C-spring. The two ends of each spring arefirmly affixed to the under side of each slat D, in such manner that atension will be produced between each set of two springs 0n the twobed-pieces B, causing the slats D to assume a curve, as shown in Fig. 2,and keeping the slats in such curved position, so that when each of theslats is in this way curved the surface of the bed will assume a convexform.

This tension between each pair of springs, to form the curve justdescribed, is independent of the tension of each spring, to produce therequisite vertical elasticity. This latter tension or elasticity iscaused by the peculiar form of the springs, and the elasticity of themetal forming them.

It will be observed that, inasmuch as each separate spring is secured toeach of the slats D at two points, as at b, each pair of springs placedon the two bed-pieces B affords four points of support to each slat, sothat each slat is held firmly in a manner that will prevent i-ts lateraldisplacement, and yet, at the same time, not interfere with thenecessary vertical elasticity of the slats, and afford a slight lateralyielding to them.

The springs O are secured to the bed-pieces B by a rivet or bolt, 0, andthe sides of the bed -pieces being beveled 05, as before mentioued,little or no obstruction is offered to the free action of the springwhen it is pressed downward by the supcrincumbent weight, as when thebed is in use, and the springs are not liable to set by its beingrepeatedly bent over the sharp upper edges of the bedpieces, as is thecase when the sides of the bed-pieces are not beveled.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is 1 i In a bed bottom, double C -springs,each spring being secured to the slats of the bottom in two places,substantially as and for the purpose described.

JOHN E. PRAUL.

